Author's Organization:Department of Veterinary Science, College of Agriculture, University of Osaka Prefecture:The University of Zambia, Faculty of Veterinary Medicine, Department of Disease Control Department of Veterinary Science, College of Agriculture, University of Osaka Prefecture
Published: August 15, 1992Received: September 03, 1991Available on J-STAGE: February 15, 2008Accepted: March 10, 1992
Advance online publication: -
Revised: -